CA Civ Code Section 1954.535

Where an owner terminates or fails to renew a contract or recorded agreement with a governmental agency that provides for rent limitations to a qualified tenant, the tenant or tenants who were the beneficiaries of the contract or recorded agreement shall be given at least 90 days’ written notice of the effective date of the termination and shall not be obligated to pay more than the tenant’s portion of the rent, as calculated under the contract or recorded agreement to be terminated, for 90 days following receipt of the notice of termination of nonrenewal of the contract.